Finding the Fourth Proportional to 70,599, 105,908.37 and 20,682.72

Step by Step Solution

1. Step 1: Write the proportion equation
   70,599 : 105,908.37 = 20,682.72 : x
2. Step 2: Convert to fraction form
   70,599/105,908.37 = 20,682.72/x
3. Step 3: Cross multiply
   70,599x = 105,908.37 × 20,682.72
4. Step 4: Simplify right side
   70,599x = 2,190,473,162.37
5. Step 5: Solve for x
   x = 2,190,473,162.37/70,599
6. Step 6: Final answer
   x = 31,026.97